Reaching the initial coulombic efficiency and structural stability limit of P2/O3 biphasic layered cathode for sodium-ion batteries

Zhou, Jingkai; Liu, Jing; Li, Yanyan; Zhao, Zhongjun; Zhou, Pengfei; Wu, Xiaozhong; Tang, Xusheng; Zhou, Jin

doi:10.1016/j.jcis.2023.02.001

Cited by 19 publications

(3 citation statements)

References 54 publications

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“…It was found that the electrons in Mn 4+ -3d orbitals (t 2g and e g ) in NNCC-0.1 were more than that of NNCC-0, which demonstrated that the active Jahn–Teller Mn 3+ in NMNNC-0.1 was partially converted to inactive Mn 4+ after Cu-substitution, and the Jahn–Teller effect was suppressed effectively. 47 In conclusion, the DFT calculation explained why Cu-substitution could promote the cycle stability of the material. Simultaneously, Zhang and coworkers also used DFT to analyze the PDOS of Mn 3+ , Zn 2+ and Mn 4+ centers for Na [Li 0.25 Mn 0.75 ]O 2 before and after Zn-substitution.…”

Section: Overview Of Layered Oxide Cathodesmentioning

confidence: 85%

“…Hence, more electrons in Mn 3+ -3d orbitals (t 2g and e g ) indicate an intensified Jahn-Teller effect. 47 Additionally, the high-spin Mn 3+ ion has two different electron configurations: (t 2g ) 3 (d z 2) 1 and (t 2g ) 3 d (x 2 À y 2 ) 1. The former configuration induces two long Mn-O bond lengths in the z-axis direction and four short Mn-O bond lengths in the xy-plane, which is a stretched Jahn-Teller distortion.…”

Section: Challengesmentioning

confidence: 99%

“…1). [44][45][46][47] The synergistic action between the multiphase materials can play a role in ion adsorption, pseudocapacitance and inhibiting interface deterioration to increase the cycle life of the layered oxide cathodes. 48 Meanwhile, the optimization of morphology and structure can enhance the reaction kinetics, provide higher tap density and alleviate the side reactions of layered oxide cathodes and electrolytes, thereby improving the cycle life and the energy density in practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of cycle life for layered oxide cathodes in sodium-ion batteries

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Energy Environ. Sci.

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Section: Overview Of Layered Oxide Cathodesmentioning

confidence: 85%

Section: Challengesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of cycle life for layered oxide cathodes in sodium-ion batteries

Yang,

Wang,

Liu

et al. 2024

Energy Environ. Sci.

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High‐Entropy and Multiphase Cathode Materials for Sodium‐Ion Batteries

Li,

Qin,

et al. 2024

Advanced Energy Materials

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Cycling stability is the biggest challenge for cathodes of sodium‐ion batteries (SIBs), which is directly affected by the structure design. Herein, the combination of high‐entropy (HE) and multiphase structure is demonstrated to be helpful for maintaining the structure and improving the cycling stability. In the Ni/Mn/Cu/Ti/Sn five‐component HE multiphase cathode, the multiple elements at transition metal sites can enlarge the lattice and stabilize the structure simultaneously without causing an obvious capacity drop, achieving the synergistic effect of multi‐cations. In the HE cathodes consisting of P2 and O3 phases, the harmful phase transition in high‐voltage is suppressed and the cycling performance is improved. A capacity retention of 77.3 mAh g−1 after 300 cycles is delivered, and an improved rate performance of 88.7 mAh g−1 at 750 mA g−1 is observed, better than that of the low‐entropy multiphase cathode(P2 and O3) and the HE oxide single O3‐phase cathode. The weighted average ionic radius(WAIR) of all transition metals is demonstrated critical for the formation of the phase composition in HE composites. Through comparing a series of HE and multiphase cathodes, an empirical range of WAIR is obtained, which shows guidance for the design of other cathode materials.

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Low‐temperature performance of Na‐ion batteries

Li,

Zhuo,

Jing

et al. 2024

Carbon Energy

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Sodium‐ion batteries (NIBs) have become an ideal alternative to lithium‐ion batteries in the field of electrochemical energy storage due to their abundant raw materials and cost‐effectiveness. With the progress of human society, the requirements for energy storage systems in extreme environments, such as deep‐sea exploration, aerospace missions, and tunnel operations, have become more stringent. The comprehensive performance of NIBs at low temperatures (LTs) has also become an important consideration. Under LT conditions, challenges such as increased viscosity of electrolyte, abnormal growth of solid electrolyte interface, and poor contact between collector and electrode materials emerge. The aforementioned issues hinder the diffusion kinetics of sodium ions (Na+) at the electrode/electrolyte interface and cause rapid degradation of battery performance. Consequently, the optimization of electrolyte composition and cathode/anode materials becomes an effective approach to improve LT performance. This review discusses the conduction behavior and limiting factors of Na+ in both solid electrodes and liquid electrolytes at LT. Furthermore, it systematically reviews the recent research progress of LT NIBs from three aspects: cathode materials, anode materials, and electrolyte components. This review aims to provide a valuable reference for developing high‐performance LT NIBs.

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Reaching the initial coulombic efficiency and structural stability limit of P2/O3 biphasic layered cathode for sodium-ion batteries

Cited by 19 publications

References 54 publications

Improvement of cycle life for layered oxide cathodes in sodium-ion batteries

Improvement of cycle life for layered oxide cathodes in sodium-ion batteries

High‐Entropy and Multiphase Cathode Materials for Sodium‐Ion Batteries

Low‐temperature performance of Na‐ion batteries

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